Malicious PDF — malware analysis report

Static analysis result for SHA-256 879f7b622df7d72f…

MALICIOUS

PDF

51.9 KB Created: 2020-09-02 02:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a142f01aa4f11e711961e210c6c7518c SHA-1: 366ef4bb187ab6bd8046dc4f904c7a09225cda61 SHA-256: 879f7b622df7d72f3a3c9650bb85f3a8091d0cc90e6b13913d82c3e77ce372a5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=veeramani+songs+ayyappan+free'. Additionally, it exhibits a PDF link farm heuristic, embedding numerous external PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text but includes the primary malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site disguised within a seemingly innocuous document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/wix?keyword=veeramani+songs+ayyappan+free
    • https://cdn.shopify.com/s/files/1/0449/0939/6123/files/68767862412.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/3601496645.pdf
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/gamiriruko.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/26507427494.pdf
    • https://static.usrfiles.com/ugd/fe0276_f08a56d143a8442fa0019b1f678062bf.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6982/files/maplestory_reboot_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/tubunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/gibugivifa.pdf
    • https://cdn.shopify.com/s/files/1/0450/2552/5918/files/catalogo_vimar_download.pdf
    • https://static.usrfiles.com/ugd/07e02c_74551cd7cb4c474c9a9b10b20205956a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f9e3cc8fca1437bb4a68dfac41caea2.pdf
    • https://static.usrfiles.com/ugd/99a8f2_c16a994a32c3430fa4b31e1661c0ee8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3145514fadbc403c980e1205c7af80c7.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008483.bin
007c24e52cd30485e84f5497b6afd48ca71ed03f2c3e670257fa180fd2e6ae93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8483 5256 bytes
font_01_sfnt_off0000965f.bin
807eb29c6da2deed3dfe40eb2badac8efab46b22bb4effd5dfdd23b14fc62188		 pdf-font-stream PDF embedded font (sfnt) at offset 0x965F 14496 bytes

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